Cribbage Board #10: The Wedding Board

WEDDING BOARD MECHANICAL DRAWINGS

This page contains the mechanical specifications of the wood/metal parts AND the PCB assemblies. All of the PCBs were highly integrated into the mechanical assembly. All PCB assemblies were intially modeled in SolidWorks and then detailed (dimensioned drawings made). This allowed the PCBs to be accurately designed in Protel. Additionally, this allowed for the various components and connectors to be placed without fear of collisions.

NOTE: On the purely mechanical (wood/metal) parts, most of the dimensions have been removed. I have done this to prevent someone else from creating a duplicate Wedding Board (or at least force them to do a little bit of work).

A3666_GRPOF5_PCB_RT0007X1 is included to illustrate the "binder" printed circuit board that holds the individual groups of 5 together. This sub-assembly breakdown was chosen to enable easy replacements should a board or a connector fail. During the assembly stage of the project, one such group was integrated completely and had to be removed. I was thankful that this feature had been designed in from the very beginning. Note, the 4-pin SMT connectors are precisely located to mate up with the interconnect boards.

A3666_RT-0003X is the mechanical drawing for the aluminum top plate.

A3666_RT-0004X is the mechanical drawing for the zirocote wood top frame. This part was match-routed to fit RT-0003X exactly.

A3666_RT-0005X is the mechanical drawing for the clear plastic shield for the internal workings of the top. I chose clear in order to show off all the work required to integrate 200+ connectors.

A3666_RT-0006X is the mechanical drawing for the zirocote and dowel wood power switch. Although on the lower part of the board (in the maple section) zirocote pieces were chosen that contained sapwood. This meant that they had both the dark of the zirocote and the light portions similar to the maple.

A3666_RT-0007X1 is the mechanical drawing for the Group of 5 Assembly. This drawing was key to communicate required mechanical dimensions (to myself) into the PCB layout. You'll note that the dimensions are fairly complex.

A3666_RT-0008X1 is the mechanical drawing for a "4x4 Interconnect". The Interconnect PCBs mated the various Groups of 5 together (pwr/gnd). They, too, had critical mechanical tolerances. This method was chosen, for it is cleaner (visually) than cabling, yet still allowed for the removal of a failed Group of 5.

A3666_RT-0009X1 is the mechanical drawing for a "2x4 Interconnect". The Interconnect PCBs mated the various Groups of 5 together (pwr/gnd). They, too, had critical mechanical tolerances. This Interconnect is found at the end of the board and was a special condition, for cables had to travel from this board down to the Programmer Board.

A3666_RT-0010X1 is the mechanical drawing for the Group of 2 Assembly. This drawing was key to communicate required mechanical dimensions (to myself) into the PCB layout. You'll note that the dimensions are fairly complex. The Group of 2 is the starting location for the pegs.

A3666_RT-0011X1 is the mechanical drawing for the Group of 6 Assembly. This drawing was key to communicate required mechanical dimensions (to myself) into the PCB layout. You'll note that the dimensions are fairly complex. The Group of 6 is game counter section.

A3666_RT-0012X1 is the mechanical drawing for a "3x4 Interconnect". This Interconnect PCBs mated the Group of 2 and Group of 6 assemblies together (pwr/gnd).

A3666_RT-0013X1 is the mechanical drawing for the Pegholder Assembly (and PCB). Although less critical mechanically, it still involved integrating a custom PCB with a custom wood part. Note, the connectors chosen for this (and the programmer board section) have BLACK plastic. Also note, the connector for the winning spot on the top of the board uses WHITE plastic. These were intentional decisions.

A3666_RT-0014X2 is the mechanical drawing for the Peg itself. This also includes a Bill of Materials and detailed exploded views of the Peg assembly. The fit was so tight that the ATTiny12 8-SOIC had to be "J-leaded" in order to fit. The new 8 pin MLF packages are evidently even smaller and would make the fit even better.

A3666_RT-0017X is the mechanical drawing for the wooden portion of the pegholder assembly.

A3666_RT-0018X is the mechanical drawing for the solid maple bottom. Solid figured maple was chosen for it's durability and beauty.

A3666_RT-0019X3 is the mechanical drawing for the Programmer Board. This drawing was key to communicate required mechanical dimensions (to myself) into the PCB layout. You'll note that the dimensions are fairly complex This also includes a Bill of Materials. A simple block diagram was included as well.